tamerlan said, mommy, i love you. and dzhokhar's voice came in from a distance saying, mommy, i love you. she saw the boy's father to see them on the news for the first time. and then for some reason he tells me, patimas, this is dzhokhar and tamerlan, pointed to a screen, it is tamerlan from the blue jacket, dzhokhar from the white jacket. i say, these are guys with a backpack in these photos. it can't be them. he said, i don't know, patimas, these are my children. and then his wife grabs the tv screen and starts screaming, it can't be. it can't be happening. i don't believe it. the children are there. i would have cried out myself. nick payton walsh, cnn. >>> in fact, family and friends have been a key part of the investigation so far as the fbi tries to piece together every bit of information it can. >> but it's been hard to get a view of what the brothers are like because there are a lot of conflicting views and opinions. take a listen to the suspect's mother. >> impossible. impossible for them -- for both of them